import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:分割等和子集
 * User: wangxin
 * Date: 2024-09-23
 * Time: 22:08
 */
public class test2 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别

        int n = in.nextInt();
        int[] nums = new int[n];
        for(int i = 0;i < nums.length;i++){
            nums[i] = in.nextInt();
        }

        int sum = 0;
        int max = 0;
        for(int i = 0;i < nums.length;i++){
            max = Math.max(max,nums[i]);
            sum += nums[i];
        }
        if(max > sum / 2||sum % 2!=0){
            System.out.println("false");

        }else{
            System.out.println("true");

        }



    }
}
